Jean Proulx is a Professor in, and the Director of, the School of Criminology and Researcher at the International Centre for Comparative Criminology at the University of Montreal, Canada, and a Researcher and Forensic Psychologist at the Phillippe-Pinel Institute of Montreal.

Eric Beauregard is a Professor in the School of Criminology at Simon Fraser University, Canada.

Adam J. Carter is a Forensic Psychologist and Head of Offence Specialism for Extremism and Gang Affiliated Offending, Her Majesty's Prison and Probation Service, UK.

Andreas Mokros is Chair of Personality Psychology, Assessment, and Consulting in the Department of Psychology, Faculty of Humanities and Social Sciences, FernUniversität in Hagen, Germany.

Rajan Darjee is a Consultant Forensic Psychiatrist and Adjunct Senior Research Fellow, Centre for Forensic Behavioural Science, Swinburne University of Technology and Victorian Institute of Forensic Mental Health (Forensicare), Australia.

Jonathan James is a Clinical Psychologist and a Doctoral candidate at the School of Criminology, University of Montreal, Canada.

Foreword, Tony Beech Introduction, Jean Proulx Section 1: Theories and Research. Coordinator: Jean Proulx 1. Sexual Homicide Studies: An International, Perspective Jean Proulx 2. Sexual Homicide: A Review of the Main Theoretical Models, Oliver Chan 3. The Sexual Psychopath, Stephen Porter and Katherine Rose 4. Sexual Murderers' Sexual Lifestyle: An Internal Constraint to Modus Operandi? Stéphanie Langevin, Jonathan James, Jean Proulx and Elen Vuidard 5. Serial and Nonserial Sexual Murderers: An Exploratory Study of Developmental Antecedents, Jonathan James, Patrick Lussier and Jean Proulx 6. Psychological and Criminological Factors in Diverse Types of Sexual Murderers, Tamsin Higgs and Ewa Stefanska 7. Understanding the Sexual Element in Sexual Murder, Ewa Stefanska and Tamsin Higgs 8. Sexual Murderers of Children: Psychopathological and Modus Operandi Factors, Jean Proulx, Jonathan James, Mélina Siwic and Eric Beauregard 9. Sexual Homicide of the Elderly: A Review of Patterns, Mark Safarik, John Jarvis and J. Amber Scherer 10. Stranger Sexual Homicide, Paul V. Greenall 11. A Cross-National Study of Sexual Murderers in France and Canada, Jonathan James, Jean Proulx and Patrick Lussier 12. Recent Research on Sexual Homicide in Scotland: Characteristics, Crime Scene Themes and Comparison with Nonhomicidal Sexual Aggressors, Rajan Darjee and Emily Baron 13. Perpetrators of Sexual Homicide in Germany: Medical, Psychiatric, and Psychological Characteristics, Andreas Hill, Wolfgang Berner and Peer Briken 14. Sexual Murder in South Africa, Gérard Labuschagne Section 2: Sexual Sadism. Coordinator: Andreas Mokros 15. Sexual Sadism and Sexual Homicide: An Overview, Andreas Mokros 16. The Aetiology of Forensic Sexual Sadism: From Experiential Perturbations to Symptomatology, Carrie A. Robertson, Franklyn J. Graham, Sonja Krstic and Raymond